Java 中使用 JSON 进行 http POST 后的奇怪响应

Question

我正在做一个简单的 http post，其中包含一个 json 字符串作为 http 正文。

?

除了响应本身之外，所有内容看起来都不错 - 当我将其转换为字符串时，它看起来很奇怪（不是文字）。我怎样才能以纯文本形式得到这个？或者我在发帖过程中做错了什么才能得到这个回复？ （注意 - 如果我在 POST 期间排除 cookie，我确实会从服务器返回纯 html，并带有有效的“访问被拒绝”消息）

此解决方案的完整代码如下

public class BaseHttpService {
    public ResponseAndCookies doHttpPostWithUrlWithJson(String url, String key, CookieStore cookies) {
        try {
            StringEntity se = new StringEntity("{\"filters\":true}");
            se.setContentType("text/xml");
            se.setContentEncoding(new BasicHeader(HTTP.CONTENT_TYPE, "application/json"));

            HttpPost httpost = new HttpPost(url);
            httpost.setEntity(se);

            httpost.setHeader("Accept", "application/json");
            httpost.setHeader("Content-Type", "application/json");

            return executeHttpRequest(httpost, cookies);
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
        return null;
    }

    public ResponseAndCookies executeHttpRequest(HttpRequestBase http, CookieStore cookieStore) {
        HttpClient httpclient = new DefaultHttpClient();
        HttpResponse response;
        String result = "";

        if (cookieStore != null) {
            ((DefaultHttpClient) httpclient).setCookieStore(cookieStore);
        }

        try {
            response = httpclient.execute(http);

            HttpEntity entity = response.getEntity();

            if (entity != null) {
                InputStream instream = entity.getContent();
                result = convertStreamToString(instream);
            }

        } catch (ClientProtocolException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

        List<Cookie> cookies = ((DefaultHttpClient) httpclient).getCookieStore().getCookies();
        CookieStore postCookieStore = ((DefaultHttpClient) httpclient).getCookieStore();

        ResponseAndCookies x = new ResponseAndCookies();
        x.setCookies(cookies);
        x.setResponse(result);
        x.setCookieStore(postCookieStore);

        httpclient.getConnectionManager().shutdown();

        return x;
    }

    public static String convertStreamToString(InputStream is) {
        BufferedReader reader = new BufferedReader(new InputStreamReader(is));
        StringBuilder sb = new StringBuilder();
        String line = null;
        try {
            while ((line = reader.readLine()) != null) {
                sb.append(line + "\n");
            }
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                is.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return sb.toString();
    }
}

Answer 1

您尝试使用看起来的平台编码来读取 UTF-8 字符串。
找出返回响应的内容编码并使用它转换为字符串。

如果您想用 2 行代码替换上面的代码，请告诉我。我为您准备了一个项目，该项目已经负责处理 cookie 和转换内容。